Pencil mold



July my 1927:,

. 1,635,261 C, E. DANlELS PENCIL MOLD Filed Nov. 13, 1926 Z g y? A IfINV ENTOH z- E Daniela" ATTO EY Patented July 12, 1927.

UNITED STATES 1,635,261 PATENT OFFICE.

CHARLES E. DANIELS, OF SANDUSKY, OHIO, ASSIGNOR TO THE AMERICAN CRAYO'NCOMPANY, OF SANDUSKY, OHIO, A CORPORATION OF OHIO.

PENCIL MOLD.

Application filed November 13, 1926. Serial No. 148,155.

This invention relates to pencil molds, and

has for its primary object to provide a simply constructed devicewhereby a plastic mass of wood or paper pulp may be-molded underpressure around a centrally positioned lead core.

It is another object of the invention to provide a pencil mold which maybe inexpensively produced in single orniultiple units and which isprovidedv'ith a simply formed and easily adjustable means for accurately holding the lead core in a central position. in the mold cavityagainst possible displacement under the pressure of the plastic materialas it is filled into the mold.

lVith the above and other objects in view. the invention consists in theimproved pencil mold, and in the form, construction and relativearrangement of its several parts as will.

be hereinafter more fully described, illus trated in the accompanyingdrawings, and.

subsequently incorporated in the subjoi-ned claims. I I

In the drawings, wherein I have disclosed several simple and practicalembodiments of the invention and in which similar reference charactersdesignate corresponding parts throughout the several views,

Figure 1 is a longitudinal sectional view through a single unit moldshowing one practical form of the invention;

Fig. 2 is an end elevation thereof;

Fig. 3 is a horizontal section taken on the line 33 of Fig. 1;

Fig. 4 is an end elevation illustrating a multiple type mold;

Fig. 5 is a longitudinal sectional view taken on the line 55 of Fig. 1;

Fig. 6 is a detail perspective view of one of the mold sections, and

Fig. 7 is a perspective view of the lead holding plate.

Referring in detail to the drawings, and more particularly to Figs. 1, 2and 3 thereof, the mold body 5 may consist of a metal casting having achamber or cavity 6 of predetermined cross sectional form and extendingsubstantially the entire length of the mold. At the base of this cavity,the wall of the mold is centrally provided with a cylindrical recess orsocket 7 which is adapted to receive one end of the pencil leadindicated at 8.

The other end of the mold body 5 is formed with a radially projectingarm 9 to which the arm 10 of a metal disc or plate 11 is pivotallyconnected by a suitable screw or bolt This disc 11 is provided with anopening 13 therein conforming in area and shape to the cross sectionalform of the mold chamber 6, said opening being bisected by a narrow web14 extending in the plane of the disc and centrally provided with theopening. 15. The metal disc 11 is further provided with an indentationforming a protuberance 16 adapted to seat in a shallow recess 17 formedin the end face of the mold body 5.

In the use of the molding device above described, the pencil lead 8 isarranged axially within the mold chamber with one of its ends seated inthe socket 7 and the other end of said lead positioned in the opening 15of the pi ate 11. The wood or paper pulp is then forced under pressurethrough the opening 13 in the disc 11 and into the mold chamber so thatthe fibers thereof become closely compacted in a homogeneous mass aroundthe central lead core 8. The mold is then subjected to heat by anysuitable means so that the moisture content of the'compressed pulp masswill be evaporated and driven off whereby the pulp mass is rendered hardor rigid. The edge of the disc 11 opposite the pivot 12 is then slightlylifted to disengage the protuberance 16 from the recess 17 and todisengage the projecting end ofthe lead 8 from the opening 15. This discor plate is then swung laterally on the pivot 12, thus permitting theformed pencil to be removed from the mold chamber.

In Figs. 4 to 7 inclusive, I have illustrated a multiple type mold, inwhich each mold unit consists of the two sect-ions 18 and 19,respectively, the meeting faces of which along the longitudinal edges ofthe mold sections, are provided with suitably formed tongues andgrooves, respectively, to prevent relative transverse shifting movementof the mold sections. These mold sections are also provided withregistering openings indicated at 20, said openings in a plurality ofthe mold units aligning with each other to receive the tie bolts 21. Oneend of each mold section is further provided with flanges 22 and spacedlugs 23. The meeting faces of the mold sections of each unit areprovided with mating longitudinally extending mold cavities 2 1 openingupon the latter ends of the mold sections. At the other ends of thesecavities and centrally thereof a semi-circular socket or seat indicatedat 25 is formed in the wall of each mold section.

has, when a series of mold units are assembled and secured together bymeans of the tie rods 21, a plurality of series of mold chambers areprovided and Within each chamber a lead indicated at 26 is adapted to becentrally positioned.

A lead holding plate 27 as shown in Fig. 7 of the drawings, is adaptedto be associated with each mold unit. The ends of this plate areprovided with the resiliently yieldable clamping flanges 28 which areadapted to Clamp over the flanges on the mold sections, thus holding theplate closely against the ends of said mold sections. This plate has aseries of spaced openings 29 therein similar to the openings 13previously re ferred to and which are adapted to exactly register withthe mold cavities. These openings 29 are similarly bisected by wbs 30having the central openings to receive one end of the leads 26. Thus,when the leads are inserted, they will be supported at one of their endsby these webs 30 while the other ends are supported in the sockets 2:3,thus securely holding said leads in line with the exact axial center ofthe respective mold chambers when the plastic pulp mass is forced intosaid chambers. After the mold chambers have been filled with the pulpmass, the several mold units are then subjected to the application ofheat as above referred to in order to render the pulp hard and rigid.Theseveral plates 27 are then removed and the formed pencils removedfrom the mold chambers.

From the foregoing description considered in connection with theaccompanying drawings, the construction and manner of use of myinvention as herein disclosed will be clearly understood. 1t will beseen that by means of such a mold pencils produced from a plastic massof wood pulp or paper can be very rapidly made. Likewise the pencil bodywill be accurately formed to the desired shape and size. Since the moldstructure in the several embodiments herein shown is of very simpleform, it will be apparent that the manufacturing cost thereof will berelatively small. While I have disclosed several practical instructions,it is nevertheless to be understood that the essential features of mypresent improvements may also be embodied in various other alternativeserve the privilege of resorting to all such legitimate changes thereinas may be fairly embodied within the spirit and scope of the inventionas claimed.

I claim:

1. A pencil mold coinprisinga plurality of mold units, each having aseries of chambers open at one of their ends to receive a plastic massand provided with a central recess at the other end of each mold chamherto reteive one end of a pencil lead, means for rigidly securing aplurality of the mold units in connected relation, and means adapted tobe removably connected with each mold unit and extending over the openends of the mold chambers to support the other cues of the .pencilleads.

A pencil mold comprising a plurality of mold units, each having a seriesof chambers open at one of their ends to receive a plastic nzass andprovided with a. central recess at the other end of each mold chamber toreceive one end of a pencil lead, means forrigidly securing a pluralityof the mold units in connected relation, said mold units at the openends of the chambers being provided with flanges, and a plate adaptedfor detachable connection with each m'ol'd unit having yieldable flangesat its ends to engage the flanges of the mold units, and said plateprovided with spaced openings to register with the open ends of'the moldchamber, and having means associated with each of said openings forsupporting the other ends of the pencil leads.

In testimony that 1 claim the foregoing as my invention, I have signedmy name hereto.

CHARLES E. DANIELS.

structures, and I accordingly re-

